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Commit | Line | Data |
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e9f207f0 JB |
1 | /* |
2 | * mac80211 debugfs for wireless PHYs | |
3 | * | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 5 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
e9f207f0 JB |
6 | * |
7 | * GPLv2 | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <linux/debugfs.h> | |
12 | #include <linux/rtnetlink.h> | |
9399b86c | 13 | #include <linux/vmalloc.h> |
e9f207f0 | 14 | #include "ieee80211_i.h" |
24487981 | 15 | #include "driver-ops.h" |
2c8dccc7 | 16 | #include "rate.h" |
e9f207f0 JB |
17 | #include "debugfs.h" |
18 | ||
07caf9d6 EP |
19 | #define DEBUGFS_FORMAT_BUFFER_SIZE 100 |
20 | ||
21 | int mac80211_format_buffer(char __user *userbuf, size_t count, | |
22 | loff_t *ppos, char *fmt, ...) | |
23 | { | |
24 | va_list args; | |
25 | char buf[DEBUGFS_FORMAT_BUFFER_SIZE]; | |
26 | int res; | |
27 | ||
28 | va_start(args, fmt); | |
29 | res = vscnprintf(buf, sizeof(buf), fmt, args); | |
30 | va_end(args); | |
31 | ||
32 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); | |
33 | } | |
34 | ||
279daf64 | 35 | #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \ |
e9f207f0 JB |
36 | static ssize_t name## _read(struct file *file, char __user *userbuf, \ |
37 | size_t count, loff_t *ppos) \ | |
38 | { \ | |
39 | struct ieee80211_local *local = file->private_data; \ | |
e9f207f0 | 40 | \ |
07caf9d6 EP |
41 | return mac80211_format_buffer(userbuf, count, ppos, \ |
42 | fmt "\n", ##value); \ | |
279daf64 BG |
43 | } |
44 | ||
45 | #define DEBUGFS_READONLY_FILE_OPS(name) \ | |
e9f207f0 JB |
46 | static const struct file_operations name## _ops = { \ |
47 | .read = name## _read, \ | |
234e3405 | 48 | .open = simple_open, \ |
2b18ab36 | 49 | .llseek = generic_file_llseek, \ |
e9f207f0 JB |
50 | }; |
51 | ||
279daf64 BG |
52 | #define DEBUGFS_READONLY_FILE(name, fmt, value...) \ |
53 | DEBUGFS_READONLY_FILE_FN(name, fmt, value) \ | |
54 | DEBUGFS_READONLY_FILE_OPS(name) | |
55 | ||
e9f207f0 | 56 | #define DEBUGFS_ADD(name) \ |
7bcfaf2f | 57 | debugfs_create_file(#name, 0400, phyd, local, &name## _ops); |
e9f207f0 | 58 | |
827b1fb4 | 59 | #define DEBUGFS_ADD_MODE(name, mode) \ |
7bcfaf2f | 60 | debugfs_create_file(#name, mode, phyd, local, &name## _ops); |
e9f207f0 JB |
61 | |
62 | ||
83bdf2a1 BG |
63 | DEBUGFS_READONLY_FILE(user_power, "%d", |
64 | local->user_power_level); | |
65 | DEBUGFS_READONLY_FILE(power, "%d", | |
66 | local->hw.conf.power_level); | |
07caf9d6 | 67 | DEBUGFS_READONLY_FILE(total_ps_buffered, "%d", |
e9f207f0 | 68 | local->total_ps_buffered); |
07caf9d6 | 69 | DEBUGFS_READONLY_FILE(wep_iv, "%#08x", |
e9f207f0 | 70 | local->wep_iv & 0xffffff); |
07caf9d6 | 71 | DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s", |
af65cd96 | 72 | local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); |
3b5d665b | 73 | |
8d51dbb8 THJ |
74 | static ssize_t aqm_read(struct file *file, |
75 | char __user *user_buf, | |
76 | size_t count, | |
77 | loff_t *ppos) | |
9399b86c | 78 | { |
8d51dbb8 | 79 | struct ieee80211_local *local = file->private_data; |
9399b86c | 80 | struct fq *fq = &local->fq; |
8d51dbb8 | 81 | char buf[200]; |
9399b86c | 82 | int len = 0; |
9399b86c MK |
83 | |
84 | spin_lock_bh(&local->fq.lock); | |
85 | rcu_read_lock(); | |
86 | ||
8d51dbb8 THJ |
87 | len = scnprintf(buf, sizeof(buf), |
88 | "access name value\n" | |
89 | "R fq_flows_cnt %u\n" | |
90 | "R fq_backlog %u\n" | |
91 | "R fq_overlimit %u\n" | |
2a4e675d | 92 | "R fq_overmemory %u\n" |
8d51dbb8 | 93 | "R fq_collisions %u\n" |
2a4e675d THJ |
94 | "R fq_memory_usage %u\n" |
95 | "RW fq_memory_limit %u\n" | |
8d51dbb8 THJ |
96 | "RW fq_limit %u\n" |
97 | "RW fq_quantum %u\n", | |
98 | fq->flows_cnt, | |
99 | fq->backlog, | |
2a4e675d | 100 | fq->overmemory, |
8d51dbb8 THJ |
101 | fq->overlimit, |
102 | fq->collisions, | |
2a4e675d THJ |
103 | fq->memory_usage, |
104 | fq->memory_limit, | |
8d51dbb8 THJ |
105 | fq->limit, |
106 | fq->quantum); | |
9399b86c MK |
107 | |
108 | rcu_read_unlock(); | |
109 | spin_unlock_bh(&local->fq.lock); | |
110 | ||
9399b86c | 111 | return simple_read_from_buffer(user_buf, count, ppos, |
8d51dbb8 | 112 | buf, len); |
9399b86c MK |
113 | } |
114 | ||
115 | static ssize_t aqm_write(struct file *file, | |
116 | const char __user *user_buf, | |
117 | size_t count, | |
118 | loff_t *ppos) | |
119 | { | |
8d51dbb8 | 120 | struct ieee80211_local *local = file->private_data; |
9399b86c MK |
121 | char buf[100]; |
122 | size_t len; | |
123 | ||
124 | if (count > sizeof(buf)) | |
125 | return -EINVAL; | |
126 | ||
127 | if (copy_from_user(buf, user_buf, count)) | |
128 | return -EFAULT; | |
129 | ||
130 | buf[sizeof(buf) - 1] = '\0'; | |
131 | len = strlen(buf); | |
132 | if (len > 0 && buf[len-1] == '\n') | |
133 | buf[len-1] = 0; | |
134 | ||
135 | if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1) | |
136 | return count; | |
2a4e675d THJ |
137 | else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1) |
138 | return count; | |
9399b86c MK |
139 | else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1) |
140 | return count; | |
141 | ||
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | static const struct file_operations aqm_ops = { | |
146 | .write = aqm_write, | |
147 | .read = aqm_read, | |
8d51dbb8 | 148 | .open = simple_open, |
9399b86c MK |
149 | .llseek = default_llseek, |
150 | }; | |
151 | ||
2ad4814f | 152 | #ifdef CONFIG_PM |
827b1fb4 JB |
153 | static ssize_t reset_write(struct file *file, const char __user *user_buf, |
154 | size_t count, loff_t *ppos) | |
155 | { | |
156 | struct ieee80211_local *local = file->private_data; | |
157 | ||
158 | rtnl_lock(); | |
eecc4800 | 159 | __ieee80211_suspend(&local->hw, NULL); |
827b1fb4 JB |
160 | __ieee80211_resume(&local->hw); |
161 | rtnl_unlock(); | |
162 | ||
163 | return count; | |
164 | } | |
165 | ||
166 | static const struct file_operations reset_ops = { | |
167 | .write = reset_write, | |
234e3405 | 168 | .open = simple_open, |
6038f373 | 169 | .llseek = noop_llseek, |
827b1fb4 | 170 | }; |
2ad4814f | 171 | #endif |
827b1fb4 | 172 | |
68920c97 | 173 | static const char *hw_flag_names[] = { |
30686bf7 JB |
174 | #define FLAG(F) [IEEE80211_HW_##F] = #F |
175 | FLAG(HAS_RATE_CONTROL), | |
176 | FLAG(RX_INCLUDES_FCS), | |
177 | FLAG(HOST_BROADCAST_PS_BUFFERING), | |
178 | FLAG(SIGNAL_UNSPEC), | |
179 | FLAG(SIGNAL_DBM), | |
180 | FLAG(NEED_DTIM_BEFORE_ASSOC), | |
181 | FLAG(SPECTRUM_MGMT), | |
182 | FLAG(AMPDU_AGGREGATION), | |
183 | FLAG(SUPPORTS_PS), | |
184 | FLAG(PS_NULLFUNC_STACK), | |
185 | FLAG(SUPPORTS_DYNAMIC_PS), | |
186 | FLAG(MFP_CAPABLE), | |
187 | FLAG(WANT_MONITOR_VIF), | |
188 | FLAG(NO_AUTO_VIF), | |
189 | FLAG(SW_CRYPTO_CONTROL), | |
190 | FLAG(SUPPORT_FAST_XMIT), | |
191 | FLAG(REPORTS_TX_ACK_STATUS), | |
192 | FLAG(CONNECTION_MONITOR), | |
193 | FLAG(QUEUE_CONTROL), | |
194 | FLAG(SUPPORTS_PER_STA_GTK), | |
195 | FLAG(AP_LINK_PS), | |
196 | FLAG(TX_AMPDU_SETUP_IN_HW), | |
197 | FLAG(SUPPORTS_RC_TABLE), | |
198 | FLAG(P2P_DEV_ADDR_FOR_INTF), | |
199 | FLAG(TIMING_BEACON_ONLY), | |
200 | FLAG(SUPPORTS_HT_CCK_RATES), | |
201 | FLAG(CHANCTX_STA_CSA), | |
202 | FLAG(SUPPORTS_CLONED_SKBS), | |
203 | FLAG(SINGLE_SCAN_ON_ALL_BANDS), | |
b98fb44f | 204 | FLAG(TDLS_WIDER_BW), |
99e7ca44 | 205 | FLAG(SUPPORTS_AMSDU_IN_AMPDU), |
35afa588 | 206 | FLAG(BEACON_TX_STATUS), |
31104891 | 207 | FLAG(NEEDS_UNIQUE_STA_ADDR), |
412a6d80 | 208 | FLAG(SUPPORTS_REORDERING_BUFFER), |
c9c5962b | 209 | FLAG(USES_RSS), |
6e0456b5 FF |
210 | FLAG(TX_AMSDU), |
211 | FLAG(TX_FRAG_LIST), | |
e8a24cd4 | 212 | FLAG(REPORTS_LOW_ACK), |
f3fe4e93 | 213 | FLAG(SUPPORTS_TX_FRAG), |
30686bf7 JB |
214 | #undef FLAG |
215 | }; | |
216 | ||
279daf64 BG |
217 | static ssize_t hwflags_read(struct file *file, char __user *user_buf, |
218 | size_t count, loff_t *ppos) | |
219 | { | |
220 | struct ieee80211_local *local = file->private_data; | |
30686bf7 JB |
221 | size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS; |
222 | char *buf = kzalloc(bufsz, GFP_KERNEL); | |
223 | char *pos = buf, *end = buf + bufsz - 1; | |
279daf64 | 224 | ssize_t rv; |
30686bf7 | 225 | int i; |
279daf64 | 226 | |
d15b8459 | 227 | if (!buf) |
30686bf7 JB |
228 | return -ENOMEM; |
229 | ||
230 | /* fail compilation if somebody adds or removes | |
231 | * a flag without updating the name array above | |
232 | */ | |
68920c97 | 233 | BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); |
30686bf7 JB |
234 | |
235 | for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) { | |
236 | if (test_bit(i, local->hw.flags)) | |
4633dfc3 | 237 | pos += scnprintf(pos, end - pos, "%s\n", |
30686bf7 JB |
238 | hw_flag_names[i]); |
239 | } | |
279daf64 BG |
240 | |
241 | rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); | |
242 | kfree(buf); | |
243 | return rv; | |
244 | } | |
199d69f2 | 245 | |
4a5eccaa BG |
246 | static ssize_t misc_read(struct file *file, char __user *user_buf, |
247 | size_t count, loff_t *ppos) | |
248 | { | |
249 | struct ieee80211_local *local = file->private_data; | |
250 | /* Max len of each line is 16 characters, plus 9 for 'pending:\n' */ | |
251 | size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9; | |
b2347a32 DC |
252 | char *buf; |
253 | char *pos, *end; | |
4a5eccaa BG |
254 | ssize_t rv; |
255 | int i; | |
256 | int ln; | |
257 | ||
b2347a32 DC |
258 | buf = kzalloc(bufsz, GFP_KERNEL); |
259 | if (!buf) | |
260 | return -ENOMEM; | |
261 | ||
262 | pos = buf; | |
263 | end = buf + bufsz - 1; | |
264 | ||
4a5eccaa BG |
265 | pos += scnprintf(pos, end - pos, "pending:\n"); |
266 | ||
267 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { | |
268 | ln = skb_queue_len(&local->pending[i]); | |
269 | pos += scnprintf(pos, end - pos, "[%i] %d\n", | |
270 | i, ln); | |
271 | } | |
272 | ||
273 | rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); | |
274 | kfree(buf); | |
275 | return rv; | |
276 | } | |
277 | ||
db2e6bd4 JB |
278 | static ssize_t queues_read(struct file *file, char __user *user_buf, |
279 | size_t count, loff_t *ppos) | |
280 | { | |
281 | struct ieee80211_local *local = file->private_data; | |
282 | unsigned long flags; | |
283 | char buf[IEEE80211_MAX_QUEUES * 20]; | |
284 | int q, res = 0; | |
285 | ||
286 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
287 | for (q = 0; q < local->hw.queues; q++) | |
288 | res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q, | |
289 | local->queue_stop_reasons[q], | |
3b8d81e0 | 290 | skb_queue_len(&local->pending[q])); |
db2e6bd4 JB |
291 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
292 | ||
293 | return simple_read_from_buffer(user_buf, count, ppos, buf, res); | |
294 | } | |
295 | ||
279daf64 | 296 | DEBUGFS_READONLY_FILE_OPS(hwflags); |
279daf64 | 297 | DEBUGFS_READONLY_FILE_OPS(queues); |
4a5eccaa | 298 | DEBUGFS_READONLY_FILE_OPS(misc); |
db2e6bd4 | 299 | |
e9f207f0 JB |
300 | /* statistics stuff */ |
301 | ||
e9f207f0 JB |
302 | static ssize_t format_devstat_counter(struct ieee80211_local *local, |
303 | char __user *userbuf, | |
304 | size_t count, loff_t *ppos, | |
305 | int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf, | |
306 | int buflen)) | |
307 | { | |
308 | struct ieee80211_low_level_stats stats; | |
309 | char buf[20]; | |
310 | int res; | |
311 | ||
75636525 | 312 | rtnl_lock(); |
24487981 | 313 | res = drv_get_stats(local, &stats); |
e9f207f0 | 314 | rtnl_unlock(); |
24487981 JB |
315 | if (res) |
316 | return res; | |
317 | res = printvalue(&stats, buf, sizeof(buf)); | |
e9f207f0 JB |
318 | return simple_read_from_buffer(userbuf, count, ppos, buf, res); |
319 | } | |
320 | ||
321 | #define DEBUGFS_DEVSTATS_FILE(name) \ | |
322 | static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\ | |
323 | char *buf, int buflen) \ | |
324 | { \ | |
325 | return scnprintf(buf, buflen, "%u\n", stats->name); \ | |
326 | } \ | |
327 | static ssize_t stats_ ##name## _read(struct file *file, \ | |
328 | char __user *userbuf, \ | |
329 | size_t count, loff_t *ppos) \ | |
330 | { \ | |
331 | return format_devstat_counter(file->private_data, \ | |
332 | userbuf, \ | |
333 | count, \ | |
334 | ppos, \ | |
335 | print_devstats_##name); \ | |
336 | } \ | |
337 | \ | |
338 | static const struct file_operations stats_ ##name## _ops = { \ | |
339 | .read = stats_ ##name## _read, \ | |
234e3405 | 340 | .open = simple_open, \ |
2b18ab36 | 341 | .llseek = generic_file_llseek, \ |
e9f207f0 JB |
342 | }; |
343 | ||
f1160434 JB |
344 | #define DEBUGFS_STATS_ADD(name) \ |
345 | debugfs_create_u32(#name, 0400, statsd, &local->name); | |
2826bcd8 | 346 | #define DEBUGFS_DEVSTATS_ADD(name) \ |
7bcfaf2f | 347 | debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops); |
e9f207f0 | 348 | |
e9f207f0 JB |
349 | DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount); |
350 | DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount); | |
351 | DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount); | |
352 | DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount); | |
353 | ||
e9f207f0 JB |
354 | void debugfs_hw_add(struct ieee80211_local *local) |
355 | { | |
356 | struct dentry *phyd = local->hw.wiphy->debugfsdir; | |
357 | struct dentry *statsd; | |
358 | ||
359 | if (!phyd) | |
360 | return; | |
361 | ||
e9f207f0 JB |
362 | local->debugfs.keys = debugfs_create_dir("keys", phyd); |
363 | ||
e9f207f0 | 364 | DEBUGFS_ADD(total_ps_buffered); |
e9f207f0 | 365 | DEBUGFS_ADD(wep_iv); |
bddb2afc | 366 | DEBUGFS_ADD(rate_ctrl_alg); |
db2e6bd4 | 367 | DEBUGFS_ADD(queues); |
4a5eccaa | 368 | DEBUGFS_ADD(misc); |
2ad4814f | 369 | #ifdef CONFIG_PM |
827b1fb4 | 370 | DEBUGFS_ADD_MODE(reset, 0200); |
2ad4814f | 371 | #endif |
279daf64 | 372 | DEBUGFS_ADD(hwflags); |
83bdf2a1 BG |
373 | DEBUGFS_ADD(user_power); |
374 | DEBUGFS_ADD(power); | |
8d51dbb8 THJ |
375 | |
376 | if (local->ops->wake_tx_queue) | |
377 | DEBUGFS_ADD_MODE(aqm, 0600); | |
e9f207f0 JB |
378 | |
379 | statsd = debugfs_create_dir("statistics", phyd); | |
e9f207f0 JB |
380 | |
381 | /* if the dir failed, don't put all the other things into the root! */ | |
382 | if (!statsd) | |
383 | return; | |
384 | ||
c206ca67 | 385 | #ifdef CONFIG_MAC80211_DEBUG_COUNTERS |
f1160434 JB |
386 | DEBUGFS_STATS_ADD(dot11TransmittedFragmentCount); |
387 | DEBUGFS_STATS_ADD(dot11MulticastTransmittedFrameCount); | |
388 | DEBUGFS_STATS_ADD(dot11FailedCount); | |
389 | DEBUGFS_STATS_ADD(dot11RetryCount); | |
390 | DEBUGFS_STATS_ADD(dot11MultipleRetryCount); | |
391 | DEBUGFS_STATS_ADD(dot11FrameDuplicateCount); | |
392 | DEBUGFS_STATS_ADD(dot11ReceivedFragmentCount); | |
393 | DEBUGFS_STATS_ADD(dot11MulticastReceivedFrameCount); | |
394 | DEBUGFS_STATS_ADD(dot11TransmittedFrameCount); | |
f1160434 JB |
395 | DEBUGFS_STATS_ADD(tx_handlers_drop); |
396 | DEBUGFS_STATS_ADD(tx_handlers_queued); | |
397 | DEBUGFS_STATS_ADD(tx_handlers_drop_wep); | |
398 | DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc); | |
399 | DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port); | |
400 | DEBUGFS_STATS_ADD(rx_handlers_drop); | |
401 | DEBUGFS_STATS_ADD(rx_handlers_queued); | |
402 | DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc); | |
403 | DEBUGFS_STATS_ADD(rx_handlers_drop_defrag); | |
f1160434 JB |
404 | DEBUGFS_STATS_ADD(tx_expand_skb_head); |
405 | DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned); | |
406 | DEBUGFS_STATS_ADD(rx_expand_skb_head_defrag); | |
407 | DEBUGFS_STATS_ADD(rx_handlers_fragments); | |
408 | DEBUGFS_STATS_ADD(tx_status_drop); | |
e9f207f0 | 409 | #endif |
2826bcd8 FF |
410 | DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount); |
411 | DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount); | |
412 | DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount); | |
413 | DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount); | |
e9f207f0 | 414 | } |